@misc{indiciaec7b5cea68066,
  title = {Learning the parts of objects by non-negative matrix factorization.},
  author = {D D Lee and H S Seung},
  year = {1999},
  doi = {10.1038/44565},
  url = {https://pubmed.ncbi.nlm.nih.gov/10548103/},
  note = {Source identifier: 10548103}
}